Optical-fiber secret communication device and data encryption method thereof

Abstract

The invention discloses an optical-fiber secret communication device and a data encryption method thereof. The device is formed by connecting a transmitter and a receiver through an optical fiber. The transmitter comprises a PPC power PC) processor unit, a field-programmable gate array testing plate, a light-transmitting module, an optical-fiber coupler and a connecting optical fiber; and the receiver comprises a wavelength division multiplexer, a connecting optical fiber, a light detector, a field-programmable gate array testing plate, a PPC processor unit and a signal output interface. At atransmitting end, two paths or multiple paths of input data are retransmitted through a PPC and then sent to the light-transmitting module with two or multiple wavelengths after the encryption processing by an FPGA (Field-Programmable Gate Array) to convert electrical signals into light signals. At a receiving end, two- or multi-wavelength signals respectively enter the light detector to be converted into electrical signals and then retransmitted and output after the encryption by the FPGA by the PPC. By utilizing the invention, the secrecy of transmitted data is improved, and the data decryption difficulty is improved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and more specifically relates to an optical fiber secure communication device and a data encryption method thereof. Background technique [0002] With the development of the communication industry, especially the development of optical communication with huge bandwidth, people pay more and more attention to the confidentiality of information, and security and confidentiality have become the primary issue of the communication industry. Commonly used optical communication encryption methods include information encoding encryption, algorithm encryption, and frequency hopping encryption, as well as the recently studied quantum encryption, but quantum encryption is currently only in the laboratory stage, and there is still a long way to go before commercial use. [0003] The concept of frequency hopping encryption comes from wireless frequency hopping communication. In wireless fre...

AI Technical Summary

Problems solved by technology

Commonly used optical communication encryption methods include information encoding encryption, algorithm encryption, and frequency hopping encryption, as well as the recently studied quantum encryption, but quantum encryption is currently only in the laboratory stage, and there is still a long way to go before commercial use.

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